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XEN: "x0" re-spawning too fast message in DomU consoleThis document (7000048) is provided subject to the disclaimer at the end of this document. EnvironmentNovell SUSE Linux EnterpriseServer 10 Service Pack 1Novell SUSE Linux EnterpriseServer 10 Service Pack 2 SituationSLES 10 SP1 and other some otherLinux distributions may have the following errors.In/var/log/messages:init: Id "x0" respawning toofast: disabled for 5 minutesIn/var/log/messages:Apr 13 17:02:43 bhoward5agetty[8511]: /dev/xvc0: No such file or directoryApr 13 17:02:53 bhoward5agetty[8927]: /dev/xvc0: No such file or directoryApr 13 17:03:03 bhoward5agetty[8929]: /dev/xvc0: No such file or directoryOn the console:init: Id "x0" respawning toofast: disabled for 5 minutesResolutionBetween SLES 10 and SLES 10 SP1,the version of Xen changed. In 3.04. A new console device,/dev/xvc0 was introduced to handle the console. This error is typically seen on DomU's which support "xvc0" but have b...
解决ORA-00060: Deadlock detected小例 数据库版本:?12345678SQL > select * from v$version;BANNER----------------------------------------------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64biPL/SQL Release 10.2.0.5.0 - ProductionCORE 10.2.0.5.0 ProductionTNS for Linux: Version 10.2.0.5.0 - ProductionNLSRTL Version 10.2.0.5.0 - Production 事件:数据库产生死锁: ORA-00060: Deadlock detected alert  日志如下:?123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263ORA-00060: Deadlock detected. More info in file /u01/app/oracle/admin/xezf/udump/xezf_ora_13794.trc.Wed Jul 10 12:39:00 CST 2013ORA-00060: Deadlock detected. More info in file /u01/app/oracle/admin/xezf/udump/xezf_ora_13792.trc.Wed Jul 10 12:40:02 CST 2013ORA-00060: Deadlock detected. More info in file /u01/app/oracle/admin/xezf/udump/xezf_ora_13794.trc.Wed Jul 10 12:41:56 CST 2013ORA-00060: Deadlock detected....
ORA-19527与ORA-00312和db_recovery_file_dest_size of 2048 MB is 0.00% usedErrors in file d:\oracle\product\10.2.0\admin\billing\bdump\billing_mrp0_2216.trc:ORA-19527: 必须重命名物理备用重做日志ORA-00312: 联机日志 1 线程 1: 'E:\CZ\BILLING\REDO01.LOG'Clearing online redo logfile 1 completeMedia Recovery Waiting for thread 1 sequence 13364Tue Aug 21 13:41:52  2012Completed: alter database recover managed standby database disconnect from sessionTue Aug 21 13:55:58  2012db_recovery_file_dest_size of 2048 MB is 0.00% used. This is auser-specified limit on the amount of space that will be used by thisdatabase for recovery-related files, and does not reflect the amount ofspace available in the underlying filesystem or ASM diskgroup.这是10g以后,oracle为了加快swtichover的速度,在can become a primary之前就去clear the online logfiles了,而如果没有设置log_file_name_convert,这个时候oracle可能就不认识哪怕是你copy过来的一模一样的logfile了   这个说法也在taobao dba team的blog中得到...
Centos7.2/Centos7.4配置gnome图形界面并安装vnc服务   1,首先,需要更新系统。#: yum update -y#: rebbot2,然后,安装gnome环境包。 #: yum groupinstall "GNOME Desktop" "Graphical Administration Tools" -y现在,我们要在服务器上安装 VNC 服务器了。4. yum 安装vnc #:yum install -y tigervnc  tigervnc-server tigervnc-server-module  -y5 配置vnc编辑# vim /lib/systemd/sytem/vncserver@.service找到下面这几行,用自己的用户名替换掉 。我的用户名是 root 所以我用 root 来替换掉 :ExecStart=/sbin/runuser -l -c "/usr/bin/vncserver %i"PIDFile=/home//.vnc/%H%i.pid替换为ExecStart=/usr/sbin/runuser -l root -c "/usr/bin/vncserver :1 -geometry 1024x768 -depth 16"PIDFile=/root/.vnc/%H%i.pid将 /lib/systemd/system/vncserver@.service 改为 /lib/systemd/system/vncserver@:1.service#mv /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:1.service重启 systemd#systemctl daemon-reload6.最后还要设置一下用户的 VNC 密...
  Linux系统配置Squid代理内网服务器上网功能 本文为大家介绍普通代理的搭建方式。 本实验环境:操作系统:CentOS release 6.5(Final)Squid版本:squid-3.1.23-9.el6.x86_64  1. 检查squid软件是否安装# rpm -qa|grep squid 2. 如果未安装,则使用yum 方式安装# yum -y install squid  3. 设置开机自启动# chkconfig --level 35 squid on   4. 编辑squid 的主配置文件 /etc/squid/squid.conf http_port 3128cache_mem 64 MBmaximum_object_size 4 MBcache_dir ufs /var/spool/squid 100 16 256access_log /var/log/squid/access.logacl localnet src 10.0.0.0/8http_access allow localnethttp_access deny allvisible_hostname squid.taotie.devcache_mgr admin@test.com 请注意:acl localnet src 10.0.0.0/8 中 10.0.0.0/8是ECS内网的网段,要求ECS之间内网可以互通。请根据自己的实际情况替换成内网IP段5.初始化squid# squid –z6.启动Squid# /etc/init.d/squid start 到这里squid就配置好了,我们使用另一台没有公网IP的服务器连接squid代理,测试是否可以上网。 打...
Linux服务器中vsftp如何限制用户的下载流量(带宽)  如果不需要带宽被用户上传/下载占用过大,而影响服务器的其他正常服务。可以考虑限制FTP用户的总传输带宽。vsftp中,您可以通过以下方法限制所有用户的总传输带宽最大可达1M Bytes/秒:1. 使用文本编辑器打开/etc/vsftpd/vsftpd.conf2. 添加参数 local_max_rate = 1024000保存该配置文件3. 重启FTP服务/etc/init.d/vsftpd restart 需要您注意的是,local_max_rate参数的单位是Bytes/秒,1M Bytes/秒 = 1024000 Bytes/秒。
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oracle10G/11G官方下载地址集合 直接迅雷下载 Oracle Database 11g Release 2 (11.2.0.1.0) for Microsoft Windows (64-bit)http://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_database_1of2.ziphttp://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_database_2of2.ziphttp://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_client.ziphttp://download.oracle.com/otn/nt/oracle11g/112010/win64_11gR2_grid.zipOracle Database 11g Release 2 (11.2.0.1.0) for Microsoft Windows (32-bit)http://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_database_1of2.ziphttp://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_database_2of2.ziphttp://download.oracle.com/otn/nt/oracle11g/112010/win32_11gR2_client.zipOracle Database 11g Release 2 (11.2.0.1.0) for Linux x86http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_1of2.ziphttp://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_2of2.ziphttp://download.orac...
centos 5 yum 安装 openvpn 一对多客户端  openvpn 除了fanqiang以外,还是可以做一对多点的网关,即多个客户端从不同的地方联入服务器,然后服务器作为一个中间代理人角色,所有连接到服务器的用户,可以组成一个虚拟的局域网,这样多个办公室的人可以通过vpn,如同在同一个局域网一样了.centos 5 默认的yum 源没有openvpn,所以需要添加外部的源,可以参考 http://www.unxmail.com/read.php?101然后运行 yum makecacheyum install openvpn安装完成以后,开始配置cp -R /usr/share/openvpn/easy-rsa /etc/openvpn/# 或者是这个德行,貌似不同的系统,这个位置不一样cp -R /usr/share/doc/openvpn-2.2.0/easy-rsa /etc/openvpncd /etc/openvpn/easy-rsa/2.0chmod +x ./*source ./vars下面开始生成key等文件,所有的都回车默认./clean-all创建CA ./build-ca server创建CA之后来生成服务器证书,输入./build-key-server server生成客户端证书,同样,都是默认回车./build-key client1./build-key client2最后生成Diffie Hellman参数:./build-dh证书等生成完毕,开始设置配置文件,如下的配置文件支持 单server --->> 多client,而且不会修改默...
 
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在/etc/openvpn/server.conf中增加\client-config-dir /etc/openvpn/ccd然后在 /etc/openvpn/ccd目录中放针对每个客户端的个性化配置文件。文件名就用客户端名 生成key的时候输入的 "Common Name" 名字比如要设置客户端 liushiwei为 192.168.2.24 只要在 /etc/openvpn/ccd/liushiwei文件中包含一行:ifconfig-push 192.168.2.24 255.255.255.0
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